Underground electrical conduit



(No Model.)

3Sheets-Shet 1A B. WILLIAMS. UNDERGROUND ELECTRICAL GONDUIT. No.354,290.

Patented Dec. 14, 1886.

3 Sheets-Sheet 2.

Patented'Deo. 14, 1886.

Im v e711 011':

(No Model.)

B. WILLIAMS.

UNDERGROUND ELECTRICAL GONDUIT.

N PETERS, Pbm

(No Model.)

. 3 Sheets-Sheet a, B. WILLIAMS.

UNDERGROUND ELECTRICAL GONDUIT.

Patented Dec. 14, 1886.

UNITED STATES BIJNEZETTE WILLlAlVlS, OF CHICAGO, ILL

UNDERGROUNDELE lNOIS.

CTRICAL CONDUIT.

SSPBCIPICATION forming part of Letters Patent No. 354,290, datedDecember 15}, 1886.

Application filel October 16, 1885.

To aZZ whom it may concern:

Be it known that I BENEZETTE WILLIAMs, residing at Chicago, in thecounty of Cook and State of Illinois, and a citizen of the UnitedStates, have invented a new and useful Improvement in UndergroundElectrical Conduits, of which the following is a full descrip' tion,reference being had to the accompanying drawings, in which-- Figure 1 isa vertical section; Fig. 2, ahorizontal section at line :0 of Fig. 1;Fig. 3, an enlarged sectional detail of a splice-box with cables andwires entering and going out therefrom. Fig. at is a side elevationshowing a section ofa conduit with inylocal-service splicing-boxattached. Fig. 5 is a section at line a: of Fig. 4. Fig. 6 is a top viewof the parts therein shown. Fig. 7 is a detail on a small scale, partbeing in plan and part in section.

Underground conduits for electric wires are now much used, man-holesbeing provided at suitable distances apart to allow access to cables.

The principal object of my invention is to provide means for leadingelectric conductors for local use off from a main electric conductor orfrom a group of conductors, to be broken only at a man-hole, andconnecting the same with a'local-servicc wire leading from the conduitto any desired point, which I accomplish as illustrated in theaccompanying drawings.

That which I desire to claim new will be pointed out in the claims.

In the drawings, A represents the main part of a man-hole of the usualconstruction.

13 is a casting having at its lower end a illange, a, resting on the topof A, B and A being connected together in any known suitable manner.

b is a flange on the inside of B.

c is a packing-ring resting on the flan go I).

G is a cover resting on the packing c.

d is a bar the ends of which enter recesses e on the inside of B, whichrecesses are of the form designed to receive the pin of a bayonetcatch.

f is a screw passing through d, by means of which the cover 0 can beheld securely in place. K is a second cover.

1* are passages through which surface watcr Serial No. 180,116. (Nomodel.)

the ground.

D represents a conduit made in any known suitable manner and of anysuitable form. As shown in the drawings it is square. The ends of theconduits are secured in the walls of man-holes, as shown, and theconduit is provided with any suitable number of passages, E, for theelectric wires or cables.

9 are a number of passages designed to receive the wires which connectwith the localservice wires, which passages g maybe smaller than thepassages E.

F are splice-boxes, each having a removable cover, h, and openings t,through which cables G can enter and pass into the splice-box, andopenings j, through whichwircs can pass out from the box. Thesesplice-boxes are supported within the manhole in the usual manner.

H is a local-service spliciugbo which I use for taking out a wire from amain passage of This box may the conduit for local service. be locatedat any suitable desired point on the conduit over one of the passages g,a hole be ing provided in the wall of the conduit, communicating withthe passage from which the wire is to be taken for local service. Thisservice-box, as shown, consists of a case which is open on its underside, the case resting on the top of the conduit, and having one or morescrew-threaded openings to receive nipples k, or ends of pipes, whichnipples in are designed to receive lead-cased wires or cables.

I are two saddles or holding-pieces, of the form shown, the upper andinner edges of which rest upon the flanges Z at the bottom of the box H,and these parts I extend down upon opposite sides of the conduits, asshown in Fig. 4.. i

J is a cross-bar below the conduit, the ends of which enter eyes at thelower ends of short rods m, which rods pass through a, and arescrew-threaded at their ends to receive nuts, by means of which and theparts I J m the box H can be securely held in place upon the conduit.Extending upward from the box are two ears, 0.

p is a wedge by which the cover 9* of the box is held in place.

which may reach the cover 0 can pass off to 8 represents single wireswhich have been separated from the cables G, any one of which wires maybe returned through a passage, g, to the service-box H, and be thereconnected with a local-service wire, to.

The cables G are made in sections, and the ends of two adjoiningsections may bejoined in the splice-boxes F in the usual manner, exceptthat a single wire can, if desired, be taken from the cable and becarried to a service-box in the following manner: One of the wires ofthe cable can be separated therefrom in the splice-box and be therejoined to a wire leading from the splice-box through one of the passagesg to the service-box H, where such wire can be connected with a local-se1'vice wire.

In Fig. 3, indicates one of the wires of the cable, spliced at a toanother wire, c, which passes through one of the passages g to theservice-box, where it can bejoined to a localservice wire, the box thenbeing filled with suitable insulating material.

In Fig. 3, 25 indicates another wire, spliced at a to a wire, a whichmay be carried to another servicc-box and there joined with a wire forlocal service.

As many of the service boxes H as may be required may be located betweenany two of the manholes, and be arranged to communicate with any one ofthe passages g. A single wire may be carried to each service-box H, or,if desired, a cable composed of two or more wires taken from one of thecables G may be carried to a single servicebox, the same being thereseparated and each joined with a localservice wire.

. A localservice wire may be carried to an electric apparatus located atany desired point,

and provided with a ground-wire, or with a wire leading from theapparatus to the main conductor or group of conductors, thus forming alocal metallic circuit.

that I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a conduit for electrical conductors, of alocal-service splicing box composed of a case detachably secured to theexterior of the conduit, and having an opening communicating through anopening in the wall of the conduit with the interior of the latter, forleading a conductor from the conduit to connect with a local-servicewire outside thereof, substantially as described.

2. In combination with a conduit for electric wires, a local-servicesplicing-box, H, secured to the conduit at any desired point by means ofsaddles I and clamping devices J m, substantially as and for the purposespecified.

3. The combination of a main electric conduit, a main conductor or groupof conductors, one or more single wires separated from such conductor orgroup of conductors at a manhole, a passage, 9, in the same conduit forsuch separated wire or wires, a local-service splicing-box secured tothe conduit at any desired point, and a local-service wire leading fromthe local-service splicing-box to an electric apparatus provided eitherwitha wire connecting with the ground or with a wire joining the mainconductor or group of conductors, substantially as and for the purposespecified.

BENEZETTE \VILLIAMS.

Witnesses:

ALBERT H. ADAMS, HARRY T. J ones.

